You're viewing this item in the new Europeana website. View this item in the original Europeana.

SPRING-DRIVE RATCHET MECHANISM

When eccentric 1 rotates about fixed axis A, link 17 reciprocates and rotates ratchet wheel 2 intermittently. Wheel 2 is keyed on shaft 18 which rotates about fixed axis B. In its rotation, shaft 18 consecutively winds flat spiral springs 3, 4, 5, 6 and 7. The outer ends of these springs are attached inside drums 8, 9, 10, 11 and 12, and the inner ends to hubs of ratchet wheel 2 and of the drums. …